Saw-mill dog



(No Model.) 3 Sheets-Sheet 2.

' W. M. WILKIN.

SAW MILL DOG.

No. 336,194. Patented Feb. 16, 1886.

(No Model.) WV. M- WILKIN. 3 Sheets-Sheet 3.

SAW MILL DOG.

N. PETERS. mmmunwgmphw. wnsmngcm nc.

- `UNITED STATES PATENT OFFICE.

VILLIAM M. WILKIN, OF ERIE, PENNSYLVANIA.

SAW-MILL DOG.

SZPBCIFICATION forming part of Letters Patent No. 336,194, dated February 16, 1886.

Serial No. 158,806. (No model.)

To @ZZ whom. t may concern..-

Be it known that I, NVM. M. WILKIN, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Saw-Mill Dogs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to saw-mill dogs; and it consists in improvements in the construction of the same, as will hereinafter be fully described, and pointed out in the claims.

My invention is illustrated in the accompanying drawings, as follows:

Figure l is a perspective View of a saw-mill head-block and knee and my improved dog mounted on said knee. Fig. 2 is a side elevation of the same parts seen in Fig. l, with the sliding sleeve C in vertical section on the line x w in Fig. 1. Fig. 3 is a similar view to Fig. 2, showing a slight change in the construction. Fig. 4 shows an alternative construction, which will be explained in place hereinafter.

Ais thehead-block; B, theknee; B', aguidebar attached to the knee. G and G are sliding sleeves on the guide-bar B; D and D', the lever by which the sleeves are moved vertically on the guide-bar. E E E E, CZ, and F are the dogs.

Other letters ot reference designating other parts will be referred to in proper connection herein.

The dogs E E E E slide loosely in mortises in the sleeve C. 'lhe dog C2, which engages the under edge of the log or cant, is rigidly attached to the sleeve C. The dog F is formed like a cant-hook, and is what is known to the trade as the log-dog, as its ofiice is to reach out over and grasp a log before it has been slabbed off, and it can also be used like a cant-hook to draw a cant or log which is away from the knee close up to the knee. This dog is pivoted either to the lever D, as seen in Fig. l, or to the sleeve C, as seen in Figs. 2 and 3.

In Figs. l and 2 the dog F is so placed as to lie between the sleeve C and the side of the knee, while in Fig. 3 it is placed on the outside of the sleeve C. In Figs. l and 2 it is shown to be operated to throw it out for use or draw it back by the rod f, sliding sleeve f', and springfl on the leverD. It is thrown out by shoving the sleevej" toward the knee, and the springf2 will throw it back when released. The lever f3 in Fig. 4. may be substituted for the sleeve f and the spring f. In Fig. 3 the dog F is thrown out and in by manipulating the handle F. Either of these alternative constructions can be employed as desired.

The dogs E are capable of being extended more or less beyond the face of the knee and of receding back of the face of the knee. They slide freely in the mortises in which they are set, and are prevented from escaping therefrom by their bits at one end and the pins e at the other end, and they are notched, as at e', on their under side, and thelower walls of the mortises are provided with a catch, c, to engage with the notches e. These dogs are moved out by lifting up the back end, so as to disengage the catch c from the notch e and then pushing them out, and they can be moved back by hand or by the log or cant coming in contact with them. If all the dogs E are thrown out and a cant-such as is seen in Fig. 2-is brought against the knees all the dogs above the cant will remain out while those below will be shoved hack of the face of the knee, as seen in Fig. 2.

:The dogs are moved vertically and forced into the log or cant by the lever D. Then this lever is raised, the sleeve C is moved up and the sleeve C down. Thelever can beheld at any position by the ratchet G, engaging with teeth eut on the side of the lever, (not seen in the drawings) and the engagement or disengagement is effected by swayingthc lever to one side or the other. When the lever is clear up, it will be caught and held by the spring-catch H.

The operation of my device is as follows: Vhen a round log comes onto the blocks, the operator throws up the lever D as high as is necessary, and by shoving on the sleeve f throws the log-dog F out over the top of the log, and then bears down on the lever, and thus causes the dog to catch into and draw the log up against the knee. Then the log is to IOO It is hereby certified that in Letters Patent No. 336,194, granted February 16, 1886, upon the application of William W. Wilkin, of' E rie, Pennsylvania, for an improvement in Saw-Mill Dogs,7 an error appears in the printed specication requiring correction, as follows: n line 42, page 2, the Word side should be stricken out; and that the Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed, countersigned, and sealed this 6th day of April, A. D. 1886.

[SEAL] H. L. MULDROW,

Acting Secretary of the Interior.

Gountersigned M. V. MONTGOMERY,

Commissioner of Patents. 

